PPC64 ELFv2 acts like a "normal" platform in that it no longer needs
function descriptors. So, ensure we are only enabling them on ELFv1.
Additionally, ELFv2 requires that the ELF header have a nonzero e_flags,
so ensure that the synthesized ELF header in dt_link.c is setting it.
Reviewed by: jhibbits, markj
Approved by: gnn
Differential Revision: https://reviews.freebsd.org/D22403
I believe this is left over from when dtrace was being ported and
developed out-of-tree. Now it just ensures that dtrace.ko and a non-SMP
kernel have incompatible KBIs.
PR: 243711
Sponsored by: The FreeBSD Foundation
This reverts r177661. The change is no longer very useful since
out-of-tree KLDs will be built to target SMP kernels anyway. Moveover
it breaks the KBI in !SMP builds since cpuset_t's layout depends on the
value of MAXCPU, and several kernel interfaces, notably
smp_rendezvous_cpus(), take a cpuset_t as a parameter.
PR: 243711
Reviewed by: jhb, kib
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D23512
In FreeBSD's O_SEARCH implementation, O_SEARCH in conjunction with O_RDWR or
O_WRONLY is explicitly rejected. In this case, O_RDWR was not necessary
anyways as the file will get created with or without it.
This was submitted upstream as misc/54940 and committed in rev 1.8 of the
file.
Submitted by: Bora Özarslan <borako.ozarslan@gmail.com>
Submitted by: Yang Wang <2333@outlook.jp>
Reviewed by: markj
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D19917
This appears to have been introduced in r173763. Also fix the confusing
indentation that probably led to the bug in the first place.
PR: 243759
Diagnosed by: martin@lispworks.com
MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation
sendfile(2) optionally takes a set of headers that get prepended to the
file data. If the request length is less than that of the headers,
sendfile may not allocate an sfio structure, in which case its pointer
is null and we should be careful not to dereference. This was
introduced in r356902.
Reported by: syzkaller
Sponsored by: The FreeBSD Foundation
file could reasonably be NULL here if we we're using stdin. Albeit less
likely in normal usage, one could actually hit either of these warnings on
stdin.
ubmitted by: sigsys@gmail.com
MFC after: 3 days
This change adds 2 new SYSCTLs, to retrieve the original and relocated KERNBASE
values. This provides an easy, architecture independent way to calculate the
running kernel displacement (current/load address minus original base address).
The initial goal for this change is to add a new libkvm function that returns
the kernel displacement, both for live kernels and crashdumps. This would in
turn be used by kgdb to find out how to relocate kernel symbols (if needed).
Reviewed by: jhb
Differential Revision: https://reviews.freebsd.org/D23284
vdev_read_pad2() does read VDEV_PAD_SIZE of data, and will copy size bytes
of it, hence, we need buffer of VDEV_PAD_SIZE bytes.
Issue introduced in r357497.
Reported by: se
Prior to processing environment variable set in the crontab file as those
should be of higher precedent, pull in the user or login class environment.
This is another supporting feature for allowing one to configure system-wide
settings that may affect both regular cron jobs as well as services.
This is the final part of D21481.
Submitted by: Andrew Gierth <andrew_tao173.riddles.org.uk>
As mentioned in r357562, this gives the user a single place to configure
environment variables that need to be used for various services -- the
"daemon" class -- for, e.g., configuring a system-wide HTTP proxy.
This is a part of D21481.
Submitted by: Andrew Gierth <andrew_tao173.riddles.org.uk>
This allows one to set the environment of the specified user either from
login.conf alone (-L) or both login.conf and ~/.login_conf if present (-U).
This is a supporting feature to allow service(8) to pull in the environment
of the "daemon" class before invoking the rc script.
This is a part of D21481.
Submitted by: Andrew Gierth < andrew_tao173.riddles.org.uk>
Specifically, when running /etc/rc. This allows one to specify via
login.conf(5) an environment that should be used when running services to
ease, e.g., setting up env vars for an HTTP proxy consistently across cron
and services alike.
Future changes will extend cron(8)/service(8) to use environment vars
pecified in login.conf(5) as well to promote a more cohesive experience.
This is a part of D21481.
Submitted by: Andrew Gierth <andrew_tao173.riddles.org.uk>
This is a sensible default used by, e.g., cron(8), and useful if one wanted
to honor it.
This is a part of D21481.
Submitted by: Andrew Gierth <andrew_tao173.riddles.org.uk>
This allows it to be easily suppressed in, e.g., the "daemon" class where it
will not be properly expanded.
This is a part of D21481.
Submitted by: Andrew Gierth <andrew_tao173.riddles.org.uk>
Coverity correctly reports this as a resource leak. It's an admittedly minor
one, but plug it anyways.
This has been submitted upstream as misc/54939.
CID: 978288
The cong_drop setting will apply to queues created after the setting is
changed and not to existing queues.
MFC after: 2 weeks
Sponsored by: Chelsio Communications
Add a switch to allow disabling multipage slabs, in order to facilitate
measuring memory usage and performance effects. The tunable
vm.debug.uma_multipage_slabs defaults to 1 and can be set to 0 to
disable. The name may change soon.
Reviewed by: markj (previous version)
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D23487
Memory efficiency can be poor with awkward item sizes (e.g. 1/2 or 1
page size + epsilon). In order to achieve a minimum memory efficiency,
select a slab size with a potentially larger number of pages if it
yields a lower portion of waste.
This may mean using page_alloc instead of uma_small_alloc, which could
be more costly.
Discussed with: jeff, mckusick
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D23239
Remove mbuf_jumbo_alloc and let large mbuf zones use the new uma default
contig allocator (a copy of mbuf_jumbo_alloc). Tag other zones which
require contiguous objects, even if they don't use the new default
contig allocator, so that uma knows about their constraints.
Reviewed by: jeff, markj
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D23238
After r357392, it is apparent that we do have some early-boot PCPU
zones. Make it so we can safely free pages from them if they are
actually used during early boot.
Reviewed by: jeff, markj
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D23496
There should have perhaps been an entry in OptionalObsoleteFiles for it
before, but alas- let it be removed now with `make delete-old` if it was
installed.
Reported by: Oliver Pinter
simple_httpd was granted a reprieve from the picobsd removal based on having
some reported user; it turns out this user isn't actually using the version
in base and merging their changes would be difficult at this point, so the
version in base will simply continue to rot. Retire it now, it may make a
comeback to ports with the improved version.
No notice issued because its current visibility has only been for ~3
months, and a notice has been previously issued about picobsd removal.
The caller of dump_object() is responsible for opening the file, let it
be responsible for closing too.
CID: 1411588
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
The callers only check whether the returned pointer is non-NULL, so this
was harmless in practice, but change the return value to guard against
the issue.
CID: 1411597
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
We should really create the output file in the same directory as the
destination file so that rename() works. This will be done in a future
change as part of some work to run in capability mode.
CID: 1262523
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
The code clearly meant to resize the buffer in the case where a section
was backed by multiple data descriptors.
In practice this shouldn't have been a problem since libelf would return
a single data descriptor for each section in a newly opened file.
CID: 1262522
MFC after: 1 week
Sponsored by: The FreeBSD Foundation
